docs: def deactivateAaPdpContextRequest():
      """DEACTIVATE AA PDP CONTEXT REQUEST Section 9.5.13"""
      a = TpPd(pd=0x8)
      b = MessageType(mesType=0x53)  # 01010011
      c = AaDeactivationCauseAndSpareHalfOctets()
      packet = a / b / c
      return packet